Steam-generating boiler.



L. D. LOVEKIN.

STEAM GENERATING BOILER.

APPLIGATION FILED I'EB.6, 1912.

j mwmwo Patented Feb. 16, 1915.

3 SHEETS-SHEET 1.

WITNESSES:

Aw ATTORNEY L. D. LOVEKIN.

Patented Feb. 16, 1915.

3 SHEETS-SHEET 2.

WA TTORNEY -L. D. LOVEKIN.

STEAM GENERATING BOILER. APPLICATION FILED FEB. 6, 1912;

IIJIQQJYQQD Patented Feb. 16, 1915.

[SSHEETS-SHEET 3.

I I I I I INVENTOR 2% ATTORNEY evi I I I I IMI I I I I I & WV

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I I L I i I I pure-en n. LOWEEKIN, ienrnnnnwnm, PENNSYLVANIA.

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specifioatibn oil-enters ltatent.

Patented'Febt 1th, 19 15..

Application filed reeru'ar 6,1912. swarm. 675.79 2.

Toa'll whom it may concern Be it known that l, Lo'r'rmiz D. LovnKIN, acitizen of the United States of America, residing in 'the'city andcou'nty of Philadel- 5 phiaf'in the State of Pennsylvania, haveinvented'a certain new and useful Improvement in Steam-GeneratingBoilers, of which the followin'g isa'true and exact description,reference 'being'had to the accompanying drawings, which form a partthereof;

My present invention consists in an improved steam generating boiler ofthe water tube type especially adapted "for oil firi'ng' and suitablefor marine service.

The primary object of the invention is to provide a simple and efiectiveboiler construction for the purpose specified characterized by theprovisions made for. obtaining a large combustion space and forregulating the 'clrculati-on of the hot gases through the The variousfeatures of novelty which characterize my invention are pointed out withparticularity in the claims annexed to and'forming a part of thisspecification.

For a better understanding of the invention, however, and the advantagespossessed by it, reference should be had to the accompanying drawingsand descriptive matter in which l have illustrated and described apreferred form-in which my invention may be embodied.

0f the drawings, Figure 1 is a front elevation of a marine boilerconstructed in accondance with my invention with the oil burners andprovisions fonregulatiug the admission of 'air to the combustion spaceremoved. Fig. 2 is an elevation of a portion of the water tubes and theprovisions employed in' conjunction therewith to provide a bafie tor thehot gases. Fig. 3 is'a section on the line 33 of Fig. 2. Fig. 4-is asectional elevation taken on the line 4- 4 of Fig. 1, with a portion ofthe boiler broken tion on the line 5'-5 of Fig. 4. The boilerconstruction shown by the drawings comprises an upper horizontal steamand water drum A and a lower pair of horiz'o'ntal water drums B, B,parallel to the drum A anddisposed at oppositesides thereof.The..retJ.1,rn connections 0 amd'C' connect the frontend of the'drun'i Ato the front ends of the drums B', B, and the rear ends of these drumsare similarly cbnnected by the return connections D and D. Each away.Fig. 5 is' a partial sectional eleva:

drum'B is also connected to the drum A by a corresponding set or groupof curved Water tubes E. The boiler housing F is suitably lined andcovered with heat insulating material, indicated at F and F and inclosesthe two groups of water tubes C and the major portion of the steam' andwater drums A. The water drums B, B, have their body portions embodiedin the housing wall,

the portion of these drums extending beyond the housing properbeingcovered with suitable heat insulating material F The returnconnections C and C and l) and D lie beyond the end walls of the housingproper as do the ends of the drums A and B,

B, between which these connections extend. The front end of the boilerhousing is provided in its upper portion witha series of suitablydisposed cleaning doors'F opening into the upper portion of thecombustion space, and openings F for the oil burners.

are formed in the front end wall of the housing in front of thecombustion-space G. In:- asi'nuch as the character of the oil burners atall in :Fig. 1, although the oil. burners J are shown in outline in Fig.4. A metal wall K in front of the boiler below and between the returnpipes C 0 forms the outer wall ofan air chamber surrounding the burnersJ, and doors K are provided to control the admission of air into thisair chamber.

The tubes E extend substantially vertical:-

for oil firing. To confine-'thehotgase's and prevent them' from passingappreciable amount directlyinto the lower portions of the, groups oftubes E, I provide bafies H, H, at the inner side'of each tube group Eadjacent the lower ends-of the tubes. shown, the baiiies- H are formedof bricks h, each of a width on the side adjacent the combustion chamberslightly less than one half the distance between the centers oftheadjacent tubes in the inner row. Each of of one of the tubes-1E. In theassembledbame each brick is locked in place between" one of the tubes Eand the brick h engaging the adjacent tube. The bricks are shaped toprovide a slight air gap it between the I inner sides of the twoopposing bricks at the opposite sides of a single tube E, and a somewhatlarger air gap h at the outer side of the baffle. The lower edges of thebafiles H are slightly above the lower ends of the inner rows of tubesE.

As shown, the inner rows of tubes are formed withreversely curvedportions E which give increased thickness to the groups of tubes, ,Asshown the curvature of these portions E is sufficiently sharp to preventthe baffle bricks h from sliding down on the supporting tubes-below theposition occupied by them in the drawings. To cause the hot gases"entering the groups of tubes E above the'bafiles' H from passingdirectly to the passages G between. the boiler housing and the outer.tubes E, baflles I are placed on the outer sides of the two tube groupsextending from the drum A nearly to the. level of the tops of thebaflies H. Ahood I extends fromthe tops of the baifles I' about theupper half of the drumA and shields the latter from direct contact withthe par tially cooledwaste gases passing through the channels G, to'theoutlet'passage G By preference the-upper ends'of the tubesin each groupare spread apart :as shown to provide an intertube space diminishing incross-section from the steam' and water drum A along the tubesapproximately to the plane connecting the top edge of bafiie H and thebottom edge of the bafile I. With the arrangementofwater tubesand-baffles described the bulk of the highly "heated gases passing outof the large combustion space G proper, enters the intertube space abovethe baflies H and then passes across and down along the tubes E to theoutlet M channel G. The path of the hot gases is indicated by the arrowsin Fig. 5.- As the hot gases pass into and-down from the upper end ofthe intertube space in eachfigroup of tubes E, thevolume of the gasesdiminish as they impart their heat to the tubes E, and the similardecrease in volume of the intertube space, as the distance from thesteam and water drum A-increases, gives a desirable uniformity in thespeed with which the hot gases pass through the intertube space. Withthe circulation described, the flow of hot'gases along the tubes E isfor the most part downward and counter to the direction' of flow of theascending water in the tubes E so that the upper endsof the tubes E areheated to a higher temperature than are the lower end of the tubes E.The gap between through the gap into the combustion space,

and moreover the current of hot gas passing through this gap tends tocarry the finer soot particles along with it. With the constructiondescribed it is apparent that the water circulation through the tubes Ewill be upward from the drums B to the drums A, and an adequate returnflow of water from the drum A to the drums B is insured by the large andunheated return connections C and C and D and D.

While in accordance with the provisions of the statutes I haveillustrated and described the best form of my invention now known to me,it will be apparent to those skilled in the art that changes maybemadein the forms of the apparatus disclosed without departing from thespirit of my invention, and that under some conditions certain featuresof my invention may be used with advantage without a corresponding useof other features.-

Having now described my invention what I claim as new and desire tosecure by Letters'Patent is:

1. A boiler comprising a pair of spaced apart water drums and a steam"and water drum located above and between the water drums, two outwardlybowed groups oflower portion of the inner side of each group of watertubes, the lower edge of said baflie being somewhat spaced away from theadjacent water drum, a bafiie arranged along the upper. portion of theouter side of each group of water tubes whereby a relative large portionof the hot gases from the combustion chamber is caused to enter thespaces between the tubes in each group adjacent the upper end of thelatter and then pass down by the second mentioned baffle, and arelatively small. portion of the hot gases is caused to enter the spacesbetween the tubes in each group adjacent the lower end of the tubes, thetubes in each group being spread apart adjacent their upper ends'wherebythe volume of inter tube space in each group diminishes as the distancefrom the steam and water drum increases.

2. Awboiler comprising a pair of spaced apart water drums and a steamand water drum located above and between the water drums, two outwardlybowed groups of Watertubes, one connecting one and the other the secondof said Water drums to the steam and Water drum and uniting to form thetop Wall of a combustion chamber, return connections between the ends ofthe steam and Water drum and the ends of the Water drums, a bafilearranged along the lower portions of the inner side'of each group ofWater tubes", and a baflle arranged" along. the upper portion of theouter side of each group of water tubes whereby the hot gases from thecombustion chamber are caused to enter the spaces between the tubes ineach group adjacent the upper end of the ing spread apart adjacent theirupper endswhereby the volume of the inter-tube space in each groupdiminishes as the distance from the steam and Water drum increases.LUTHER D. LOVEKIN. Witnesses:

ARNOLD KATZ, D. S. STEWART.

